#终端屏保
xxd -b -c 1 < /dev/urandom \
	| sed -r -e 's/^.+: //' -e 's/ .*//' -e 's/0/0 /g' -e 's/1/1 /g' \
	| tr -d '\n' | fold -w $((COLUMNS - 1)) \
	| while read line; do echo -e "\\033[32;1;40m$line" ; sleep 0.04 ; done
